Volume 1: Contains letters alif (الف ا) and bay (بے ب).
Volume 2: Contains letters pay (پے پ) to khey (خے خ).
Volume 3*: Contains letters ddal (ڈال ڈ) to kaf (کاف ک).
Volume 4: Contains letters kaf (کاف ک) to yay (یے ی).
*: Volume 3 is a later edition with different pagination, from another publisher. As a result the letter dal (دال د) is missing between second and third volumes and the letter kaf (کاف ک) appears in both third and fourth volumes.